G – Ventrolla Perimeter Sealing Technique (VPSS). The Ventrolla Perimeter Sealing Program (VPSS) comprises various draught-proofing elements that perform together to seal your complete perimeter from the sash window. These incorporate the sealing process installed earlier mentioned the top sash, both throughout the sash by itself or in a few parting bead going https://carriep673vek0.vigilwiki.com/user